Prescription Drug Information: Asenapine (Page 3 of 7)

6.1 Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

Monotherapy in Pediatric Patients with Bipolar Mania: The following findings are based on a 3-week , placebo-controlled trial for bipolar mania in which asenapine was administered at doses of 2.5 mg, 5 mg, or 10 mg twice daily.

Adverse Reactions Leading to Discontinuation of Treatment:A total of 6.7% (7/104) of patients treated with asenapine 2.5 mg twice daily, 5.1% (5/99) of patients treated with asenapine 5 mg twice daily, and 5.1% (5/99) of patients treated with asenapine 10 mg twice daily discontinued treatment due to adverse reactions compared to 4% (4/101) on placebo. The most common adverse reactions that led to discontinuation in pediatric patients treated with asenapine (rates at least 2% in any asenapine arm and at least twice the placebo rate) were somnolence (3% in the 2.5 mg twice daily group, 1% in the 5 mg twice daily group, and 2% in the 10 mg twice daily group), abdominal pain (2% in the 10 mg twice daily group), and nausea (2% in the 10 mg twice daily group) No placebo-treated patients dropped out for these events.

Adverse Reactions Occurring with asenapine at an Incidence of 2% or More in asenapine-treated Bipolar I Patients:Adverse reactions associated with the use of asenapine (incidence of ≥2% in any asenapine dose group and greater than placebo) that occurred during acute therapy are shown in Table 10.

Table 10: Adverse Reactions Reported in 2% or More of Pediatric Patients (Ages 10 to 17 Years) in Any Asenapine Dose Group and Which Occurred at Greater Incidence Than in the Placebo Group in a 3-Week Bipolar Mania Trial

System Organ Class / AE Preferred Term Placebo Asenapine 2.5 mg twice daily Asenapine 5 mg twice daily Asenapine 10 mg twice daily All Asenapine 2.5, 5, and 10 mg
N=101 % N=104 % N=99 % N=99 % N=302 %
Cardiac Disorders
Tachycardia1 0 3 0 1 1
Gastrointestinal Disorders
Oral hypoesthesia2 4 25 25 30 27
Nausea 3 6 6 6 6
Vomiting 3 4 4 4 4
Abdominal pain3 7 9 3 5 6
Glossodynia 0 0 2 0 1
General Disorders and Administrative Site Disorders
Fatigue4 5 4 8 14 9
Irritability 1 1 1 2 1
Injury, Poisoning, and Procedural Complications
Muscle strain 0 0 0 2 1
Investigations
Increased weight 0 6 2 2 3
Hyperinsulinemia5 0 1 3 1 2
ALT increased 0 0 0 2 1
AST increased 0 0 0 2 1
Metabolism and Nutrition Disorders
Increased appetite 2 10 9 6 8
Dehydration 1 0 2 0 1
Musculoskeletal and Connective Tissue Disorders
Myalgia 0 0 2 1 1
Nervous System Disorders
Somnolence6 12 46 53 49 49
Headache 6 8 11 9 9
Dizziness 3 6 10 5 7
Dysgeusia 2 4 5 9 6
Akathisia 0 2 2 1 2
Parkinsonism 0 1 0 2 1
Psychiatric Disorders
Insomnia 3 3 4 3 3
Suicidal ideation 1 4 1 3 3
Anger 0 0 0 2 1
Reproductive System and Breast Disorders
Dysmenorrhea 1 0 2 0 1
Respiratory, Thoracic, and Mediastinal Disorders
Oropharyngeal pain 2 0 3 1 1
Nasal congestion 1 0 2 0 1
Dyspnea 0 0 2 0 1
Skin and Subcutaneous Tissue Disorders
Rash 1 0 1 2 1

1 Includes the preferred terms tachycardia and heart rate increased.

2 Includes the preferred terms oral hypoesthesia, oral paresthesia, and oral dysesthesia.

3 Includes the preferred terms abdominal pain, abdominal pain upper, abdominal pain lower, and abdominal discomfort.

4 Includes the preferred terms fatigue and lethargy.

5 Includes the preferred terms hyperinsulinemia and blood insulin increased.

6 Includes the preferred terms somnolence, sedation, and hypersomnia.

Dose-Related Adverse Reactions:In the short term pediatric bipolar I trial the incidence of fatigue appeared to be dose-related (see Table 10).

Adjunctive Therapy in Adult Patients with Bipolar Mania: The following findings are based on a 12 week placebo-controlled trial (with a 3 week efficacy endpoint) in adult patients with bipolar mania in which sublingual asenapine was administered in doses of 5 mg or 10 mg twice daily as adjunctive therapy with lithium or valproate.

Adverse Reactions Associated with Discontinuation of Treatment:Approximately 16% (25/158) of asenapine-treated patients discontinued treatment due to an adverse reaction, compared with about 11% (18/166) on placebo. The most common adverse reactions associated with discontinuation in subjects treated with asenapine (rates at least 1% and at least twice the placebo rate) were depression (2.5%), suicidal ideation (2.5%), bipolar I disorder (1.9%), insomnia (1.9%) and depressive symptoms (1.3%).

Adverse Reactions Occurring at an Incidence of 2% or More Among Asenapine-Treated (Adjunctive) Bipolar I Patients:Adverse reactions associated with the use of asenapine (incidence of 2% or greater, rounded to the nearest percent, and asenapine incidence greater than placebo) that occurred during acute adjunctive therapy at 3 weeks, a time when most of the patients were still participating in the trial, are shown in Table 11.

Table 11: Adverse Reactions Reported in 2% or More of Adult Patients In Any Asenapine-Dose Group and Which Occurred at Greater Incidence Than in the Placebo Group at 3 Weeks in Adjunctive Bipolar Mania Trials

System Organ Class/Preferred Term Placebo N=166 % Asenapine 5 mg or 10 mg twice daily* N=158 %
Gastrointestinal disorders
Dyspepsia 2 3
Oral hypoesthesia 0 5
General disorders
Fatigue 2 4
Edema peripheral <1 3
Investigations
Increased weight 0 3
Nervous system disorders
Dizziness 2 4
Other extrapyramidal symptoms (excluding akathisia) 5 6
Somnolence 10 22
Psychiatric disorders
Insomnia 8 10
Vascular disorders
Hypertension <1 3

* Asenapine 5 mg to 10 mg twice daily with flexible dosing.

Extrapyramidal symptoms included: dystonia, parkinsonism, oculogyration, and tremor (excluding akathisia).

Somnolence includes the following events: somnolence and sedation.

Dystonia: Symptoms of dystonia, prolonged abnormal contractions of muscle groups, may occur in susceptible individuals during the first few days of treatment. Dystonic symptoms include: spasm of the neck muscles, sometimes progressing to tightness of the throat, swallowing difficulty, difficulty breathing, and/or protrusion of the tongue. While these symptoms can occur at low doses, they occur more frequently and with greater severity with high potency and at higher doses of first generation antipsychotic drugs. An elevated risk of acute dystonia is observed in males and younger age groups [see Dosage and Administration (2.3), Use in Specific Populations (8.4), and Clinical Pharmacology (12.3)].

Extrapyramidal Symptoms: In the short-term, placebo-controlled bipolar mania adult trials, data was objectively collected on the Simpson Angus Rating Scale for extrapyramidal symptoms (EPS), the Barnes Akathisia Scale (for akathisia) and the Assessments of Involuntary Movement Scales (for dyskinesias). The mean change from baseline for the all-asenapine 5 mg or 10 mg twice daily treated group was comparable to placebo in each of the rating scale scores.

In short-term placebo-controlled bipolar mania adult trials, the incidence of EPS-related events, excluding events related to akathisia, for asenapine-treated patients was 8% versus 4% for placebo; and the incidence of akathisia-related events for asenapine-treated patients was 7% versus 3% for placebo. The incidence rates of all EPS events (including akathisia) were lower at the 5 mg twice daily dose (11% of N=122) than the 10 mg twice daily dose (25% of N=119) in another study.

In a 3-week, placebo-controlled pediatric trial with bipolar I disorder, the incidences of EPS-related events, excluding events related to akathisia, were 4%, 3%, and 5% for patients treated with asenapine 2.5 mg, 5 mg, and 10 mg twice daily, respectively, as compared to 3% for placebo-treated patients. EPS-related events include: bradykinesia, dyskinesia, dystonia, oromandibular dystonia, muscle contractions involuntary, muscle twitching, musculoskeletal stiffness, parkinsonism, protrusion tongue, resting tremor, and tremor.

For events of akathisia, incidences were 2%, 2%, and 1% for pediatric patients treated with asenapine 2.5 mg, 5 mg, and 10 mg twice daily, respectively, as compared to 0% for placebo-treated patients.

Other Findings: Oral hypoesthesia and/or oral paresthesia may occur directly after administration of asenapine and usually resolves within 1 hour.

Laboratory Test Abnormalities:

Transaminases:Transient elevations in serum transaminases (primarily ALT) in the short-term bipolar mania adult trials were more common in treated patients. In short-term, placebo-controlled bipolar mania adult trials, the mean increase in transaminase levels for asenapine-treated patients was 6.1 units/L compared to a decrease of 3.9 units/L in placebo-treated patients. The proportion of patients with transaminase elevations ≥3 times upper limit of normal (ULN) (at Endpoint) was 2.1% for asenapine-treated patients versus 0.7% for placebo-treated patients. The incidence rate of transaminase elevations ≥3 times ULN is 3% of N=95 for 10 mg twice daily dose, and 0% of N=108 for the 5 mg twice daily dose and 0% of N=115 for placebo in another study.

In a 52-week, double-blind, comparator-controlled trial that included primarily adult patients, the mean increase from baseline of ALT was 1.7 units/L.

In a 3-week, placebo-controlled pediatric trial with bipolar I disorder, transient elevations in serum transaminases (primarily ALT) were more common in treated patients. The proportion of pediatric patients with ALT elevations ≥3 times upper limit of normal (ULN) was 2.4% for patients treated with asenapine 10 mg twice daily versus none for the other asenapine dose groups and placebo-treated patients.

Prolactin: In short-term, placebo-controlled bipolar mania adult trials, the mean increase in prolactin levels was 6.7 ng/mL for asenapine-treated patients compared to a decrease of 1 ng/mL for placebo-treated patients. The proportion of patients with prolactin elevations ≥4 times ULN (at Endpoint) were 2% for asenapine-treated patients versus 0.8% for placebo-treated patients.

In a long-term (52-week), double-blind, comparator-controlled adult trial, the mean decrease in prolactin from baseline for asenapine-treated patients was 26.9 ng/mL.

In a 3-week, placebo-controlled pediatric trial with bipolar I disorder, the mean increases (at Endpoint) in prolactin levels were 3.2 ng/mL for patients treated with asenapine 2.5 mg twice daily, 2.1 ng/mL for patients treated with asenapine 5 mg twice daily, and 6.4 ng/mL for patients treated with asenapine 10 mg twice daily compared to an increase of 2.5 ng/mL for placebo-treated patients. There were no reports of prolactin elevations ≥4 times ULN (at Endpoint) for patients treated with asenapine or placebo. Galactorrhea or dysmenorrhea were reported in 0% of patients treated with asenapine 2.5 mg twice daily, 2% of patients treated with asenapine 5 mg twice daily, and 1% of patients treated with asenapine 10 mg twice daily compared to 1% of placebo-treated patients. There were no reports of gynecomastia in this trial.

Creatine Kinase (CK):The proportion of adult patients with CK elevations >3 times ULN at any time were 6.4% and 11.1% for patients treated with asenapine 5 mg twice daily and 10 mg twice daily, respectively, as compared to 6.7% for placebo-treated patients in pre-marketing short-term, fixed-dose trials in bipolar mania and another indication. The clinical relevance of this finding is unknown.

The proportion of patients with CK elevations ≥3 times ULN during a 3-week trial in pediatric bipolar I disorder at any time were 1%, 0%, and 1% for patients treated with asenapine 2.5 mg, 5 mg, and 10 mg twice daily, respectively, versus 3% for placebo-treated patients.

Other Adverse Reactions Observed During the Premarketing Evaluation of Asenapine:

Following is a list of MedDRA terms that reflect adverse reactions reported by patients treated with sublingual asenapine at multiple doses of ≥5 mg twice daily during any phase of a trial within the database of adult patients. The reactions listed are those that could be of clinical importance, as well as reactions that are plausibly drug-related on pharmacologic or other grounds. Reactions already listed for adult patients in other parts of Adverse Reactions (6) , or those considered in Contraindications (4), Warnings and Precautions (5) or Overdosage (10) are not included. Reactions are further categorized by MedDRA system organ class and listed in order of decreasing frequency according to the following definitions: those occurring in at least 1/100 patients (frequent) (only those not already listed in the tabulated results from placebo-controlled trials appear in this listing); those occurring in 1/100 to 1/1000 patients (infrequent); and those occurring in fewer than 1/1000 patients (rare).

Blood and lymphatic disorders: infrequent: anemia; rare: thrombocytopenia

Cardiac disorders: infrequent: temporary bundle branch block

Eye disorders: infrequent: accommodation disorder

Gastrointestinal disorders: infrequent: swollen tongue

General disorders: rare: idiosyncratic drug reaction

Investigations: infrequent: hyponatremia

Nervous system disorders: infrequent: dysarthria

Following is a list of MedDRA terms not already listed either for adults or pediatric patients in other parts of Adverse Reactions (6) , or those considered in Contraindications (4), Warnings and Precautions (5) or Overdosage (10) that reflect adverse reactions reported by pediatric patients (Ages 10 to 17 years) treated with sublingual asenapine at doses of 2.5 mg, 5 mg, or 10 mg twice daily during any phase of a trial within the database of pediatric patients.

Eye disorders: infrequent: diplopia, vision blurred

Gastrointestinal disorders: infrequent: gastroesophageal reflux disease

Injury, Poisoning, and Procedural Complications: infrequent: fall

Skin and subcutaneous tissue disorders: infrequent: photosensitivity reaction

Renal and urinary disorders: infrequent: enuresis

RxDrugLabels.com provides trustworthy package insert and label information about marketed prescription drugs as submitted by manufacturers to the U.S. Food and Drug Administration. Package information is not reviewed or updated separately by RxDrugLabels.com. Every individual prescription drug label and package insert entry contains a unique identifier which can be used to secure further details directly from the U.S. National Institutes of Health and/or the FDA.

As a leading independent provider of trustworthy medication information, we source our database directly from the FDA's central repository of drug labels and package inserts under the Structured Product Labeling standard. RxDrugLabels.com provides the full prescription-only subset of the FDA's repository. Medication information provided here is not intended as a substitute for direct consultation with a qualified health professional.

Terms of Use | Copyright © 2023. All Rights Reserved.